For all the pollutants, the parameters required by the
software (annual and seasonal maximum and annual
98th percentiles) were obtained and concentrations were
recorded to 10 μg/m3 categories, corresponding to
equivalent exposure categories. For O3, data were
expressed as an 8 h “moving average”; for NO2, as a 1 h
average concentrations and for SO2 and PM10 as daily
averages.